MOBILE WORKING DEVICE WITH SUPPORTING EXTENSION ARMS AND METHOD FOR ERECTING SAID DEVICE

摘要

The invention relates to a mobile working device, particularly an auto-concrete pump, comprising a chassis (10), two front and two rear supporting extension arms (22,24) which can rest on a base (36) and which can be moved outwards from a transport position into at least one working position and which are respectively supported with the aid of a telescopic supporting leg (28) which can be driven by means of a drive unit. The drive units of the supporting legs (28) can be controlled by means of a computer-assisted control electronics system (40) comprising at least one manually actuated control element (58,60). According to the invention, at least one force sensor (38) is associated with each supporting extension arm (22,24) in order to measure the supporting forces relating to the supporting legs, wherein the control electronics system is provided with an evaluation routine which reacts to the force measurement values (Fi) of the supporting force sensors (38) and a predefined minimum comparative value (Fmin) in order to control the drive units of at least one selected supporting leg (38). One particularity of the invention is that the control electronics system (40) is provided with an evaluation routine (B,C) to ensure coupled control of the drive units of the four supporting legs (28) with the aid of a manually actuated control element (58,60).